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Rhodizite

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About RhodiziteHide

Formula:
(K,Cs)Al4Be4(B,Be)12O28
Colour:
Colourless, white, greyish, yellowish; colourless in transmitted light
Lustre:
Adamantine, Vitreous
Hardness:
8
Specific Gravity:
3.305 - 3.38
Crystal System:
Isometric
Name:
From the Greek, "rhodizein," = "to be rose-coloured" in allusion to its property of turning a blowpipe flame rose-red. Do not confuse with Rhodesite.
The potassium analogue of Londonite. Londonite-Rhodizite Series.


First described by Rose in 1834 without quantitative chemical data. A chemical analysis was made by Damour (1882) but later showed to be incomplete, lacking both Li and Be. The alkali metals were also not separated in the analysis. Pekov et al. (2010) re-analyzed co-type specimens of rhodizite from Sarapulsk and Shaitanka, Russia and found all to be Cs-dominant (Cs > K) and thus londonite according to IMA nomenclature. No rhodizite has been verified from the co-type localities. However, K-dominant members of the londonite-rhodizite series have been noted from Madagascar.
Note: Both K-dominant and Cs-dominant samples from Madagascar prior to the description of londonite (the Cs-dominant member of the londonite-rhodizite series) by Simmons et al. (2001) have been described as rhodizite in the literature.

NOTE:
Specimens from Madagascar without analysis should be labeled as londonite-rhodizite series. Many crystals contain complex patchy zones of londonite and rhodizite which are only visible by back-scattered electron imaging (Simmons et al. 2001).

Visit gemdat.org for gemological information about Rhodizite.


Classification of RhodiziteHide

Approved, 'Grandfathered' (first described prior to 1959)
6.GC.05

6 : BORATES
G : Heptaborates and other megaborates
C : Tekto-dodecaborates
25.8.2.1

25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
8 : Miscellaneous
9.1.16

9 : Borates
1 : Borates of the alkalis and boric acid

Physical Properties of RhodiziteHide

Adamantine, Vitreous
Transparency:
Transparent, Translucent
Colour:
Colourless, white, greyish, yellowish; colourless in transmitted light
Hardness:
Cleavage:
Distinct/Good
On {111} and {1¯11}, difficult.
Fracture:
Conchoidal
Density:
3.305 - 3.38 g/cm3 (Measured)    3.24 g/cm3 (Calculated)

Optical Data of RhodiziteHide

Type:
Isotropic
Comments:
Exhibits weak anomalous double refraction distributed in sectors with Z(+) inclined about 10° to [110].

Chemical Properties of RhodiziteHide

Formula:
(K,Cs)Al4Be4(B,Be)12O28
IMA Formula:
KBe4Al4(B11Be)O28
Common Impurities:
Rb,Na,K

Crystallography of RhodiziteHide

Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
P4 3m
Cell Parameters:
a = 7.31 Å
Unit Cell V:
390.62 ų (Calculated from Unit Cell)
Morphology:
Crystals dodecahedral, also tetrahedral. "o" usually smooth and shining and "d" frequently uneven.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0014483RhodizitePring A, Din V K, Jefferson D A, Thomas J M (1986) The crystal chemistry of rhodizite: a re-examination Mineralogical Magazine 50 163-1721986Ambatofinandrahana, Ankarata Mts, Madagascar0293
0015418RhodiziteBuerger M J, Taxer K (1966) Rhodizite. Structure and composition Science 152 500-5021966Manjaka, Madagascar0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Type Occurrence of RhodiziteHide

Synonyms of RhodiziteHide

Other Language Names for RhodiziteHide

Relationship of Rhodizite to other SpeciesHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
22 photos of Rhodizite associated with RubelliteA(D3)G6(T6O18)(BO3)3X3Z
15 photos of Rhodizite associated with TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
6 photos of Rhodizite associated with QuartzSiO2
5 photos of Rhodizite associated with ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
5 photos of Rhodizite associated with AlbiteNa(AlSi3O8)
3 photos of Rhodizite associated with DanburiteCaB2Si2O8
2 photos of Rhodizite associated with Columbite-(Mn)Mn2+Nb2O6
2 photos of Rhodizite associated with Béhierite(Ta5+,Nb5+)(BO4)
1 photo of Rhodizite associated with Pseudocubic QuartzSiO2
1 photo of Rhodizite associated with Elbaite-Liddicoatite Series

Related Minerals - Nickel-Strunz GroupingHide

6.GC.05Londonite(Cs,K,Rb)Al4Be4(B,Be)12O28Iso. 4 3m : P4 3m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.1.1SassoliteH3BO3Tric. 1 : P1
9.1.2MetaboriteHBO2Iso.
9.1.3DiomigniteLi2[B4O7]Tet.
9.1.4BiringucciteNa2B5O8(OH) · H2OMon.
9.1.5NasiniteNa2[B5O8(OH)] · 2H2OOrth.
9.1.6KerniteNa2[B4O6(OH)2] · 3H2OMon. 2/m : P2/b
9.1.7EzcurriteNa4B10O17 · 7H2OTric. 1 : P1
9.1.8TincalconiteNa2(B4O7) · 5H2OTrig. 3 2 : R3 2
9.1.9BoraxNa2(B4O5)(OH)4 · 8H2OMon. 2/m : B2/b
9.1.10AmeghiniteNa(H4B3O7)Mon.
9.1.11SborgiteNa[B5O6(OH)4] · 3H2OMon.
9.1.12AristarainiteNa2MgB12O20 · 8H2OMon. 2/m : P21/b
9.1.13SantiteK[B5O6(OH)4] · 2H2OOrth.
9.1.14Larderellite(NH4)B5O7(OH)2 · H2OMon.
9.1.15Ammonioborite(NH4)2[B5O6(OH)4]2 · H2OMon. 2/m : B2/b

Fluorescence of RhodiziteHide

Other InformationHide

Electrical:
Pyroelectric.
Notes:
Insoluble in acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for RhodiziteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Rose, G. (1834): Über den Rhodizit, eine neue Mineralgattung. Poggendorf’s Annalen der Physik und Chemie. 33, 253-256.
Rose, G. (1835): On rhodizite, a new mineral. Gornyi Zh., kn. 2, 383-388 (in Russian)
Rose, G. (1836): Fernere Bemerkungen über den Rhodizit. Pem>Poggendorf’s Annalen der Physik und Chemie. 39, 321-323.
Ries and Rose (1843) Annalen der Physik, Halle, Leipzig: 59: 353.
Bertrand (1882) Bulletin de la Société française de Minéralogie: 5: 31, 72.
Damour, A. (1882): Sur la rhodizite. Bulletin de la Société française de Minéralogie. 5, 98-103.
Klein (1891) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: I: 65.
Pisani (1910) Bulletin de la Société française de Minéralogie: 33: 37.
Dupare, Wunder, and Sabot (1911) Bulletin de la Société française de Minéralogie: 34: 131.
Goldschmidt, V. (1922) Atlas der Krystallformen. 9 volumes, atlas, and text, vol. 7: 123.
Strunz (1938) Doctoral dissertation.
Strunz (1943) Naturwissenschaften: 31, No. 5.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 329-330.
American Mineralogist (1966): 51: 533-534.
Pring, A., V.K. Din, D.A. Jefferson, D.A., J.M. Thomas (1986) The crystal chemistry of rhodizite: a re-examination. Mineral. Mag.: 50: 163-172.
American Mineralogist (1987): 72: 1028.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
Simmons, W.B., F. Pezzotta, A.U. Falster, and K.L. Webber (2001) Londonite, a new mineral species: the Cs-dominant analogue of rhodizite from the Antandrokomby granitic pegmatite, Madagascar. Canadian Mineralogist (2001): 39: 747-755.
Pekov, I. V., Yakubovich, O.V., Massa, W., Chukanov, N. V., Kononkova, N.N., Agakhanov, A. A. & Karpenko, V. Y. (2010): Londonite from the Urals, and new aspects of the crystal chemistry of the rhodizite-londonite series. Canadian Mineralogist. 48: 241-254

Internet Links for RhodiziteHide

Localities for RhodiziteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Madagascar
 
  • Amoron'i Mania
    • Ambatofinandrahana
      • Fenoarivo
Behier, J. (1960): Contribution á la mineralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive. p. 56
    • Ambositra
      • Sahatsiho Ambohimanjaka
Pezzotta F., Falster A.U., Simmons W.B. & Webber K.L. (1997): Rhodizite from Madagascar, new localities and new chemical data. Abstracts of the First International Workshop on Petrology, Milan, Italy, September 11 to 13, 1997, Mus. Storia Nat. Sc. Nat.; Canadian Mineralogist Volume 39, Number 3, June 2001, 747-755:
Pezzotta F., Falster A.U., Simmons W.B. & Webber K.L. (1997): Rhodizite from Madagascar, new localities and new chemical data. Abstracts of the First International Workshop on Petrology, Milan, Italy, September 11 to 13, 1997, Mus. Storia Nat. Sc. Nat.
Pezzotta F., Falster A. U., Simmons W. B., Webber K. L. (1998): New data on rhodizite from Madagascar. 17th General Meeting of the International Mineralogical Association, Abstracts & Programme, August 9-14, Toronto, Canada, p. A153; Madagaskar, extraLapis No. 17, pages 66-68 / Canadian Mineralogist Volume 39, Number 3, June 2001, 747-755
        • Manandona Valley
Lacroix, A. (1922): Mineralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. A.Challamel (Éditeur), Paris. 624p ; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 330; Canadian Mineralogist (2001): 39: 747-755.
Pezzotta F., Falster A. U., Simmons, Wm.B. & Webber, K.L. (1997): Rhodizite from Madagascar, new localities and new chemical data. Abstracts of the First International Workshop on Petrology, Milan, Italy, September 11 to 13, 1997, Mus. Storia Nat. Sc. Nat.: Simmons, W.B., F. Pezzotta, A.U. Falster, and K.L. Webber (2001) Londonite, a new mineral species: the Cs-dominant analogue of rhodizite from the Antandrokomby granitic pegmatite, Madagascar. Canadian Mineralogist (2001): 39: 747-755.
Pezzotta F., Falster A. U., Simmons, Wm.B. & Webber, K.L. (1997): Rhodizite from Madagascar, new localities and new chemical data. Abstracts of the First International Workshop on Petrology, Milan, Italy, September 11 to 13, 1997, Mus. Storia Nat. Sc. Nat.
  • Analamanga
Arthur Thomas, Gemstones (2009), p. 48
  • Anosy
    • Amboasary Sud
      • Tranomaro
Behier, J.(1960): Contribution á la mineralogie de Madagascar. Ann.Geol. Mad. XXIX, p 56/ http://www.minsocam.org/MSA/Special/Pig/PIG_articles/Anjahamiary.pdf
  • Vakinankaratra
    • Antsirabe II
      • Ibity
        • Sahatany Valley
Larsen, K. E. (2003): Mineralene i Sahatany pegmatittfelt, Madagaskar. Norsk Bergverksmuseums Skrift. 25, 5-18(in norwegian)
Lacroix, A. (1912): Sur quelques minéraux des pegmatites du Vakinankaratra (Madagascar). Bulletin de la Société française de Minéralogie, Paris 35 , 76-84
    • Betafo
      • Andrembesoa
        • Tetezantsio-Andoabatokely Pegmatite Field
Knut Edvard Larsen Collection # M-710
Knut Edv.Larsen collection / Laurs, B. M.; Pezzotta, F.; Simmons, W.; Falster, A. U & Muhlmeister, S. (2002): Rhodizite-londonite from the Antsongombato pegmatite, Central Madagascar. Gems & Mineralogy. 38 (4), 326-339
      • Anosiarivo Manapa
        • Antsentsindrano
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871; [Eur.J.Min 13:159-165]; Handbook of Mineralogy (http://www.handbookofmineralogy.org/pdfs/rhodizite.pdf)
Russia (TL)
 
  • Sverdlovsk Oblast
    • Beryozovsky
      • Sarapulka
Pekov,I. (1998): Minerals first discovered on the territory of the former Soviet Union, p. 174; Pekov, I. V., Yakubovich, O.V., Massa, W., Chukanov, N. V., Kononkova, N.N., Agakhanov, A. A. & Karpenko, V. Y. (2010): Londonite from the Urals, and new aspects of the crystal chemistry of the rhodizite-londonite series. Canadian Mineralogist. 48: 241-254
    • Rezhevsky District
      • Shaitanka District
Pekov,I. (1998): Minerals first discovered on the territory of the former Soviet Union, p. 174; Pekov, I. V., Yakubovich, O.V., Massa, W., Chukanov, N. V., Kononkova, N.N., Agakhanov, A. A. & Karpenko, V. Y. (2010): Londonite from the Urals, and new aspects of the crystal chemistry of the rhodizite-londonite series. Canadian Mineralogist. 48: 241-254
UK
 
  • England
    • Devon
      • West Devon
        • Okehampton Hamlets
http://www.mindat.org/mesg-7-92300.html; http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi; Embrey, P.G. (1973) Memorial of Arthur William Gerald Kingsbury. American Mineralogist, 58, 372-375.; von Knorring, O., Condliffe, E. (1984) On the occurrence of niobium-tantalum and other rare-element minerals in the Meldon aplite, Devonshire. Mineralogical Magazine, 48(348), 443-448 (referring to Kingsbury).
USA
 
  • Wisconsin
    • Florence Co.
      • Fern
        • Pine River pegmatites
Falster, A. , W.B. Simmons & P.B. Moore (1996) The mineralogy and geochemistry of the Animikie Red Ace pegmatite in Florence County, Wisconsin: Recent Research Developments in Mineralogy: 1: 7-67.
 
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